LCHL - Trigonometry - Identities and Proofs

Miss Sarah Tallon

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31 окт 2024

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Комментарии : 9

@Eoghan0C 4 месяца назад

Brilliant video, thank you! Helped a lot ahead of LC P2!

@MissSarahTallon 4 месяца назад

Glad to hear that it was helpful! Best of luck in all your exams!

@brayanmani1078 2 года назад

For pg. 15 the products to sums and differences should we always put a half in front if there is no 2

@MissSarahTallon 2 года назад

Yes - you can think of it as dividing both sides of the identity by 2. Dividing by 2 is easier to work with when written as multiply by a half.

@khadijah150 2 года назад

@ 26:30 why didn’t you multiply COS(A) by the 2SIN(A)

@khadijah150 2 года назад

Shouldn’t it be 2sinacosa then cos^2

@MissSarahTallon 2 года назад

When you multiply Cos(A) by 2Sin(A) the answer is 2CosASinA or 2SinACosA. That is as simple as it goes.

@MissSarahTallon 2 года назад

I think you are mixing it up with how it would work if there was a plus in the middle e.g. (2SinA + CosA)(CosA)... What we have is one term 2SinACosA. Does this answer your question?

@khadijah150 2 года назад

@@MissSarahTallon ohhh that makes so much sense thank you !